All E-Z-Top bottles come packaged with two sturdy clip-on style brackets. The Hanger Bracket uses a simple hook arrangement that fits over the cross wires on most cages. The Threaded Bracket uses a large threaded knob that screws onto the bracket, providing a very secure mount. The bottle easily clips on and off of both brackets without removing the brackets, themselves. Choose the bracket that best suits your situation, or use both brackets at the same time.